RowSet interface is another key interface from JDBC API, which extends the ResultSet interface to provide support for the JavaBean component model. Along with convenient methods to set connection parameters like the setUrl(), setUsername(), setPassword() and setCommand(), it also defines getters and setters for different data types e.g. getLong() and setLong(). Another feature of RowSet is that it supports event listeners. You can attach listeners to RowSet object to listen for events, much like Observer design pattern. RowSet acts as Subject and notifies Observer on events like change in cursor location, change in a row, or change in the entire RowSet. There are two types of RowSet available in JDBC 4.1 API, connected and disconnected.